check following example how to use php :
$ch = curl_init ("http://www.example.com/");
$fp = fopen ("example_homepage.txt", "w");
curl_setopt ($ch, CURLOPT_FILE, $fp);
curl_setopt ($ch, CURLOPT_HEADER, 0);
curl_exec ($ch);
curl_close ($ch);
fclose ($fp);
AND for more function about functions
curl_close - Close a CURL session
curl_errno - Return an integer containing the last error number
curl_error - Return a string containing the last error for the
current session
curl_exec - Perform a CURL session
curl_getinfo - Get information regarding a specific transfer
curl_init - Initialize a CURL session
curl_setopt - Set an option for a CURL transfer
curl_version - Return the current CURL version
